Machine for truing jewel settings



(No Model.) 5 sheets-sheet 1.

T. GILL.y MACHINE FOR TRUING JEWEL SETTINGS.

No. 485,410. Patented Nov. l, 1892.'

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T. GILL. MACHINE FOR TRUING JEWEL SETTINGS. NQ. 435,410. Patented NW1,1892.

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(No Model.)

T. GILL. MACHINE FOR TRUING JEWEL SETTINGS.

No. 485,410. Patented N0v .r1,i1 892.

(No Model.) l 5 sheets-sheet 4.

MACHINE EOEv TRUING JEWEL SETTINGS.

No. 485,410. ,Patented Novfl, 1892.

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T; G1111; MACHINE EIOR TRUING JEWELXSETTINGS. NQ. 485,410. l v PatentedNov. 1, 1892.

WlTJ 1:55.25 l /X/ 55%@ W i J7 UNITED STATES PATENT OFFICE.

THOMAS GILL, OF WALTHAM, MASSACHUSETTS, ASSIGNOR OF ONE-HALF TO 4 JOHNSTARK, OF SAME PLACE.

MACHINE FOR TRUING JEWEL-SETTINGS.

SPECIFICATION forming part of. Letters Patent No. 485,410, datedNovember 1, 1892.

Application led March 28, 189.2. Serial No. 426,742. (No model.) l

To a/ZZ whom it may concern:

Be it known that I, THOMAS GILL, of Waltham, inthe county of Middlesexand State of Massachusetts, have invented certain new and usefulImprovements in Machines for Truing Jewel-Settings, of which thefollowing is a specification. This invention has for its object toprovide a machine adapted toturn the periphery of ro a watch-jewelsetting in such manner as to make said periphery absolutely true andconcentric with the arbor-receiving orifice formed in the jewel.

In preparingjewels for application to watch and clock movements thejewel, which has been previously drilled to receive the arbor, isinserted in a metal setting of cylindrical form, said setting beingsuitably compressed or upset at its ends to engage it with the jewel. zoHeretofore much difficulty has been experienoed in locating the orificein the jewel at the exact center of the peripheryof the setting, or, inother words, providing the jewel with asetting the periphery of which isabso- 2 5 lutely concentric with theoriiice in the jewel. My inventionconsists in the improvements hereinafter described, whereby the jeweland its setting are centered by the orifice in the jewel preparatory tothe operation of turning 3o off the periphery of the setting, so thatsaid periphery will be formed concentric with said orifice, as I willnow proceed to describe.

In the accompanying drawings, forming part of this specilication,Figurel represents 3 5 a front elevation of a machine embodying my invent-ion.Fig. 2 represents a top view of the same. Fig. 3 represents a section online 3 3, Fig. 2. Figs. 3fL and 3b represent enlarged sectional views.Fig. 4 represents an end view 4o of the machine. Figs. 5.and 6 representend views of a jewel and its setting, on an enlarged scale, Fig. 5showing the setting with its periphery eccentric to the orifice in thejewel, while Fig. 6 shows the setting after it has been trued Vbytheaction of myimproved machine. Fig. 7 represents a section on line 7 7,Fig. 3, looking toward the right. Fig. 8 represents a perspective viewshowing the chucks or centers which engage the jewel and setting, said5o chucks being shown as separated and a jewel and setting interposedbetween them. Fig. 9

same parts in all the figures.

represents a perspective view of the parts shown in' Fig. 8, showing thesetting grasped by the centers and ready for the turning or truingoperation.

' The same letters of reference indicate the In the drawings, arepresents the supporti ing frame or base, towhich is affixed a frame b,having bearings b b,in which is journaled 6o a spindle c, said spindlebeing adapted to both rot-ate and move lengthwise in said bearings.

d represents another spindle, which is located in a line with thespindle 'c and is journaled in bearings c e on a frame'e, which is 65affixed to the bed a. The spindles c and cl are both positively rotatedinthe same direction by means of gears f g, affixed to a shaft h, andpinions f g', affixed, respectively, to the spindles c and cl andmeshing, respect- 7o ively, with the gears f and g. The spindle c ismovable endwise toward and from the spindle d, its endwise movementbeing effected by means of a cam t', affixed to a shaftj, a lever t",pivoted at 2 to an ear affixed to the 75 frame b, said lever beingengaged at its upper end with the spindle c and provided at its lowerend with a trundle-roll is, bearing against one side of the cam t', anda springt, connected at one endwith lever t" and at 8o its opposite endwith an adjusting-screw i5, engaged Ywith the supporting-bed a. The cam1l is formed to give the spindle c a movement through the levert" in thedirection indicated y by the arrow in Fig. 3, thus moving the spindle caway from the spindle CZ. When the projecting part of the cam t' recedesfrom the roll 3, the spring 4 moves the lever t" and spindle c to theposition shown in Fig. 3, thus causing the spindle c to co-operate withthe 9o spindle d in grasping a jewel-setting.

To prevent the spindle c from rotating when it is withdrawn or movedbackwardly, I make the gear f, that communicates motion from the shaft hto said spindle, normally loose upon said shaft and provide a clutchmember]c2 on the hub of the gear f, a sliding clutch member f3, which isengaged with the shaft h by means of akey or feather, so that itnecessarily rotates with the shaft and is free to i: slide thereon, alever f4, pivoted at f5 to aiixed support, one end of said lever beingbifurcated and engaged with a groove in the sliding clutch member, a camf6, afixed to the shaftj, said cam bearing against a trundleroll f7 onthe leverf, and a spring f8, Fig. 2, arranged to normally engage thesliding clutch member f3 with the clutch member f2. The cam f is timedso that when the spindle c is moved outwardly said cam will act on the1ever f in such manner as to separate the sliding clutch member f5 fromthe memberfz, so that the rotary movement of the spindle c will cease.lVhen the spindle e moves back to its operative position, the cam f Greleases the le- Verf4 and permits the spring f8 to connect the clutchmembers f3 f2.

m represents a rod which is movable lengthwise within the spindle d, thelatter being hollow, as shown in Fig. 3, and is provided at one end witha centering-pin m', which projects through an orifice in the end of thespindle d and is made conical at its outer end, which is reduced to afine point in order that it may enter the orifice 7a2 in the jewel 7e',inclosed by the setting k. (See Figs. 5 and 6.) The rod m is pressedlengthwise, so as to normally project the centering-pin m' from the endof the spindle d by means of a spring m2, Fig. 3. The extent to whichthe outerend of the centering-pin projects from the end of the spindlecl may be determined by means of an adjusting nut m3, engaged with athreaded portion of the exterior of the spindle d and a pin m4, whichpasses through the rod m and through slots 'm5, Fig. l, in the spindled, said pin bearing upon one side of the nut m3, as shown in Figs. l and2,and being held in contact with said nut by the spring m2. By turningsaid nut in one direction or the other the een tering-pin may be causedto project more or less, as will be readily seen. The pointed end of thepin m is adapted to enter the orifice in the jewel, which, with itssetting, is interposed between the spindles c d, as hereinafterdescribed, and thus center the jewel or locate it so that its orificewill be exactly in the axial line of the spindles c d, the centering-pinbeing supported laterally by the spindle (l by the closeness of its fitin the orifice of said spindle, so that its pointed end in entering theorifice in the jewel is capable of giving the jewel and its setting theslight lateral movement that may be required to bring the orifice of thejewel into exact coincidence with the axial line of the spindles c d.

0 represents a chute for the reception of a number ofjewel-containingsettings k. Said chute is formed as indicated in Figs.l, 7,8, and D and provided at its lower end with a trough o', which isopen at its sides and is adapted to contain the lowest setting in thecolumn or procession in the chute, the latter being inclined, so thatthe settings will enter the trough o by gravitation. The chute o isoscillated by mechanism presently described, so that the trough o' willalternately stand between the spindles c d, as shown in Fig. S,

and below said spindles, as shown in Figs. 7 and 9, the chute beingelevated to the position shown in Fig. 8 when the spindle c iswithdrawn, and depressed to the position shown in Figs. 7 and 9 afterthe spindle c is moved forward to its operative position. It will beseen that the trough b is formed t0 permit the spindle c in movingforward toits operative position to move the j ewel-setting 7i; in saidtrough laterally into contact with the end of the spindle CZ and thecentering-pin m', projecting therefrom, as shown in Fig. 9. After thisoperation the chute 0 swings downwardly and the column of settings ismoved by gravitation, so that the next setting in the chute falls intothe trough 0', and is there arrested until the chute again assumes theposition shown in Fig. S.

The mechanism for oscillating the chute o, as here shown, is as follows:The chute is pivoted at 02 to a fixed standard on the supporting-frame.03, Fig. 7, represents a lever which is pivoted at o4 to a fixed supportand is connected at its upper end with the chute by a link o5. The lowerportion of the lever 03 is held by a spring oG in contact with a cam 07,affixed to the shaftj. Said cam is so formed and timed that it moves thelever 03 to the p0- sition shown in dotted lilies in Fig. 7, and thusraises the lower end of the chute when the spindle c is withdrawn, andthen permits the spring o(i to restore the lever to the position shownin full lines, thus depressing the chute after the setting has beenengaged with the spindles and centering-point. Then a jewelsetting isgrasped and rotated by the spindles c d, its periphery is turned olf andmade concentric with the orifice in the jewel by means of a cutter p,supported by a slide p', which is movable lengthwise of the spindles c don the bed a, so that the cutter commences to act at one edge or side ofthe setting and moves along the periphery thereof to the opposite edgeor side in a direction parallel with the axis of the setting. The cutterp is attached directly to a lever p2, which is pivoted at p3 to an earon a slide p4. Said slide is adapted to move lengthwise of the spindlesc d on another slidep5, which is adapted to move cross wise of saidspindles on the slidep. The 0bject of the slides 114195 is simply topermit the cutter to be adjusted both toward and from the axis of thework and parallel therewith. The slidep is moved to carry the cutteralong the work, as above described, by means of a cam p3 on a disk orbody p7, aihxed to the shaftj, said cam acting on a roll p on a studp10,aiixed to the slide p. A spring p12, attached at one end to a studon the slide p and at the other end to a fixed support, gives the slidep and cutter p their return movement when the cam p8 retreats. Theobject of the pivoted lever or arm p2, which directly supports eutterp,is to enable said cutter to be raised during its return movement. Thisresult is accomplished by means of a cam p13, Fig. 7, on the disk p7,and a stud p, affixed IOC IIC

to raise the lever p2 and cutter p while the.

slide p is being moved by the spring p12.

The machine may be driven by a belt running from a driving-shaft on apulley r on the l shaft h and suitable connections between the shafts hand j, said connections comprisinga bevel-gear s on shaft h, a shaft s',having a bevel-gear s2, meshing with s, a worm s3, affixed to shaft s',and a worm-gear s4, affixed to shaft j and meshing with said worin. y

The operation is as follows: The spindle c being retracted, the chuteois raised, as in Fig. 8, thus interposing a setting and its containedjewl between the two spindles. -The spindle c is then advanced, as shownin Fig. 9, and thus caused to move the setting into Contact with thespindle d and engage the. orifice of the jewel with the centering-pin,so f cutter p is raised and returned to its startingpoint, the spindle cbeing at the same time withdrawn and releasing the completed setting.This completes one cycle of movement, which is repeated with everyjewel-setting.

I do not limit myself to the details of mechanism here shown, and mayvary the same in many particulars without departing from the spirit ofmy invention, an essential feature of which is a device to insure thecoincidence of the orifice in the jewel with the axis or center ofrotation of the device which rotates Vthe jewel and setting and presentsthe periphery of the setting to a cutter.

Figs. 3, 3, and 3b show the spindle c, provided with a self-adjusting orrocking tip om, which bears against one side of the jewelsetting and isadapted to rock or tip to a sufficient extent to conform to anyvariation in the thickness of the setting. It sometimes happens that thesides of a jewel-setting are not exactly parallel, so that the settingwould be thicker at one part than at another. It is therefore importantto have the bearingsurface of one of the spindles self-adjusting, sothat a iirm bearing of both spindles on the opposite sides of thesetting maybe insured. To this end I reduce the body of the spindle, asshown in Figs. 3 and 3a, and give the reduced portion a tapering form.On the reduced portion I place the tip 01, which has an internal cavityadapted to receive the said reduced portion, said cavity having agreatertaper than the reduced portion, so that the tip can rock or oscillate,and thus enable its outer end to occupy various inclinations. The tip010 is normally held with its outer end in a vertical position lby meansof springs cl2, interposed between the rear end of the tip and thereduced portion of the spindle, said springs being supported byrods 013,the .inner ends of whichbear upon the reduced portion of the spindle,while their outer ends are free to play in orifices formed inthe tip.

I claim- 1. In a machine for truing jewel-settings, the combination,with two jewel grasping and rotating spindles in line with each other,of

a centering device supported by one of said spindles and adapted toengagethe orifice of a jewel and cause the same to coincide with theaxis of rotation of the said devices and a cutter to which the settingis presented by said devices, as set forth.

2.l In a machine for truing jewel-settings the combination of twospindles adapted to grasp between them and rotate a jewel-setting, acentering-pin supported by one of said spindles and adapted to engagethe oritice of a jewel, the spindle supporting the centering-pin havingno other projection outside the radial line of the end of the said pin,and a cutter arranged to act on a setting rotated by said spindles, asset forth.

3. In a machine for truing jewel-settings, the combination of aspindle,a centering-pin longitudinally movable in said spindle andyieldingly projected therefrom, another spindle arranged in a line withthe first-mentioned spindle and adapted to co-operate therewith ingrasping and rotating a jewel-setting and in engaging the orifice in thejewel with said centering-pin, and a cutter arranged to act on therotating setting, as set forth.

4. In a machine for truing jewel-settings, the combination of a spindle,a centering-pin longitudinally movable in said spindle and yieldinglyprojected therefrom,- a longitudinally-movable spindle arranged toco-operate with the centering-pin in centering a jewel and its settingand with the other spindle'in grasping and rotating the centeredsetting, and a cutter to which the setting is presented by saidspindles, as set forth.

5. In a machine for truing jewel-settings, the combination of aspindle,a centering-pin longitudinally movable in said spindle andyieldingly projected therefrom, a longitudinally-movable spindlearranged to co-operate with the centering-pin and with the otherspindle, as described, a carrier, substantially as described, forpresenting the'settings to said spindles, and a cutter to which the set-IOO IIO

tings are presented by the spindles, as set forth.

6. In a machine for truing jewel-settings, the combination of a hollowspindle, a springpressed centering-pin movable longitudinally in saidspindle and located in the axial line thereof, another spindle movablelongitudinally with its axis in line with the centeringpin, mechanismfor rotating said spindles, a

pivoted chute adapted to contain a series of settings, a cutter arrangedto aet on a setting rotated by said spindles, and operating devices,substantially as described, whereby the chute is oseiliated, the movablespindle is moved lengthwise toward and from the hoiiow spindle, and thecutter is moved along the work.

7. The combination, with the spindle hav ing the centering-pin, of the(zo-operating spindie having a rocking or self-adjusting tip adapted toconform to the inclined sides of a setting, said tip having a taperedcavity itting over the end of its spindle, and springs interposedbetween the sides of the spindle and the inside of the cavity.

In testimony whereof I have signed my name to this specification, in thepresence of two subscribing witnesses, this 19th day of March, A. D.1892.

THOMAS GILL.

Vitnesses:

JOHN STARK, C. F. BROWN,

